The following table lists the threshold settings available for the Mailbox Server category:
Threshold  | 
Description  | 
Value  | 
RPC request currently executing within the information store process must be less than:  | 
Sets the maximum threshold for the number of executing Remote Procedure Calls (RPC) in the Information Store process.  | 
Default: 70  | 
RPC Averaged Latency must not exceed:  | 
Sets the maximum threshold for average latency of the Remote Procedure Calls (RPC) in milliseconds  | 
Default: 25  | 
RPC Number of Slow Packets must be less than:  | 
Sets the maximum threshold for the Remote Procedure Call (RPC) packets within the past 1024 packets with latencies longer than 2 seconds.  | 
Default: 3  | 
Messages Queued for Submission (Mailbox) must be less than:  | 
Sets the maximum threshold for the number of submitted messages in the Mailbox that have not yet been processed by the transport layer.  | 
Default: 50  | 
Messages Queued for Submission (Public) must be less than:  | 
Sets the maximum threshold for the number of submitted messages by that have not yet been processed by the transport layer.  | 
Default: 20  | 
Replication Receive Queue Size must be less than:  | 
Sets the maximum threshold for the number of replication messages waiting to be processed.  | 
Default: 100  | 
Slow Findrow Rate must not exceed:  | 
Sets the maximum threshold for the rate at which the slower FindRow needs to be used in the mailbox store. A higher value indicates that applications are searching mailboxes, directly affecting server performance.  | 
Default: 10  | 
Number of search tasks created per second must be less than:  | 
Sets the maximum threshold for the number of search tasks created each second.  | 
Default: 10  | 
Average Document Indexing Time must be less than:  | 
Sets the maximum threshold in seconds for the length of time it takes to index documents. This value is reported in milliseconds and converted to seconds for this comparison.  | 
Default: 30  |